1 | // |
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2 | // ******************************************************************** |
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3 | // * License and Disclaimer * |
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4 | // * * |
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5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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7 | // * conditions of the Geant4 Software License, included in the file * |
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8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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9 | // * include a list of copyright holders. * |
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10 | // * * |
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11 | // * Neither the authors of this software system, nor their employing * |
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12 | // * institutes,nor the agencies providing financial support for this * |
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13 | // * work make any representation or warranty, express or implied, * |
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14 | // * regarding this software system or assume any liability for its * |
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15 | // * use. Please see the license in the file LICENSE and URL above * |
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16 | // * for the full disclaimer and the limitation of liability. * |
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17 | // * * |
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18 | // * This code implementation is the result of the scientific and * |
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19 | // * technical work of the GEANT4 collaboration. * |
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20 | // * By using, copying, modifying or distributing the software (or * |
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21 | // * any work based on the software) you agree to acknowledge its * |
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22 | // * use in resulting scientific publications, and indicate your * |
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23 | // * acceptance of all terms of the Geant4 Software license. * |
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24 | // ******************************************************************** |
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25 | // |
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26 | // |
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27 | // $Id: ExN05PiModel.cc,v 1.7 2006/06/29 17:53:34 gunter Exp $ |
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28 | // GEANT4 tag $Name: geant4-09-03-cand-01 $ |
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29 | // |
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30 | #include "ExN05PiModel.hh" |
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31 | |
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32 | #include "G4PionMinus.hh" |
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33 | #include "G4PionPlus.hh" |
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34 | #include "G4Gamma.hh" |
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35 | |
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36 | ExN05PiModel::ExN05PiModel(G4Region *anEnvelope) : |
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37 | G4VFastSimulationModel("ExN05PiModel",anEnvelope) |
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38 | {;} |
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39 | |
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40 | ExN05PiModel::~ExN05PiModel() |
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41 | {;} |
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42 | |
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43 | G4bool ExN05PiModel::IsApplicable(const G4ParticleDefinition& particleType) |
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44 | { |
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45 | return |
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46 | &particleType == G4PionMinus::PionMinusDefinition() || |
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47 | &particleType == G4PionPlus::PionPlusDefinition(); |
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48 | } |
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49 | |
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50 | G4bool ExN05PiModel::ModelTrigger(const G4FastTrack& fastTrack) { |
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51 | //------------------------------------------------------------- |
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52 | // UserTrigger() method: method which has to decide if |
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53 | // the parameterisation has to be applied. |
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54 | // Here ModelTrigger() asks the user (ie you) a 0/1 answer. |
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55 | // |
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56 | // Note that quantities like the local/global position/direction etc.. |
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57 | // are available at this level via the fastTrack parameter (allowing |
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58 | // to check distance from boundaries, see below to allow the decision) |
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59 | //-------------------------------------------------------------- |
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60 | G4cout << "\nExN05PiModel::ModelTrigger() called:" << G4endl; |
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61 | G4cout << "--------------------------------" << G4endl; |
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62 | G4cout << "(particle is a " << fastTrack.GetPrimaryTrack()-> |
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63 | GetDefinition()->GetParticleName() << " )\n" << G4endl; |
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64 | |
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65 | // -- Examples of available informations: |
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66 | |
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67 | // -- position: |
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68 | G4cout << " Track position: " << |
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69 | fastTrack.GetPrimaryTrack()->GetPosition() << "(global coord.)" << |
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70 | fastTrack.GetPrimaryTrackLocalPosition() << "(in envelope coord.)" |
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71 | << G4endl; |
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72 | |
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73 | // -- direction: |
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74 | G4cout << " Track direction:" << |
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75 | fastTrack.GetPrimaryTrack()->GetMomentum().unit() << |
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76 | "(global coord.)" << |
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77 | fastTrack.GetPrimaryTrackLocalDirection() << "(in envelope coord.)" << |
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78 | G4endl; |
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79 | |
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80 | return true; |
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81 | } |
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82 | |
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83 | void ExN05PiModel::DoIt(const G4FastTrack& fastTrack, |
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84 | G4FastStep& fastStep) |
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85 | //-------------------------------------------------- |
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86 | // |
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87 | // User method to code the parameterisation properly |
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88 | // said. |
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89 | // |
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90 | //-------------------------------------------------- |
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91 | { |
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92 | |
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93 | //------------------------------------------------ |
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94 | // The primary track continues along its direction. |
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95 | // One secondary (a photon) is added: |
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96 | //------------------------------------------------ |
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97 | G4cout << " Pion `model' applied\n" << G4endl; |
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98 | |
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99 | //------------------------------ |
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100 | // Primary: |
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101 | // idem as in "DefaultModel": |
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102 | // |
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103 | //------------------------------ |
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104 | G4ThreeVector position; |
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105 | G4double distance; |
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106 | distance = fastTrack.GetEnvelopeSolid()-> |
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107 | DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(), |
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108 | fastTrack.GetPrimaryTrackLocalDirection()); |
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109 | position = fastTrack.GetPrimaryTrackLocalPosition() + |
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110 | distance*fastTrack.GetPrimaryTrackLocalDirection(); |
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111 | |
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112 | // -- set final position: |
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113 | fastStep.ProposePrimaryTrackFinalPosition(position); |
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114 | |
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115 | //--------------------------- |
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116 | // Secondary: |
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117 | // Adds one "secondary": |
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118 | // |
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119 | //--------------------------- |
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120 | // -- First, user has to say how many secondaries will be created: |
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121 | fastStep.SetNumberOfSecondaryTracks(1); |
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122 | |
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123 | //------------------------ |
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124 | // -- Build the secondary: |
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125 | //------------------------ |
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126 | // -- direction: |
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127 | G4ParticleMomentum direction(fastTrack.GetPrimaryTrackLocalDirection()); |
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128 | direction.setZ(direction.z()*0.5); |
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129 | direction.setY(direction.y()+direction.z()*0.1); |
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130 | direction = direction.unit(); // necessary ? |
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131 | |
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132 | // -- dynamics (Note that many constructors exists for G4DynamicParticle |
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133 | // -- see prototype/particle+matter/particles/management/include/G4DynamicParticle.hh) |
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134 | G4DynamicParticle dynamique(G4Gamma::GammaDefinition(), |
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135 | direction, |
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136 | fastTrack.GetPrimaryTrack()-> |
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137 | GetKineticEnergy()/2.); |
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138 | // -- position: |
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139 | G4double Dist; |
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140 | Dist = fastTrack.GetEnvelopeSolid()-> |
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141 | DistanceToOut(fastTrack.GetPrimaryTrackLocalPosition(), |
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142 | direction); |
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143 | G4ThreeVector posi; |
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144 | posi = fastTrack.GetPrimaryTrackLocalPosition() + Dist*direction; |
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145 | |
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146 | //------------------------------------ |
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147 | //-- Creation of the secondary Track: |
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148 | //------------------------------------ |
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149 | fastStep.CreateSecondaryTrack(dynamique, posi, |
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150 | fastTrack.GetPrimaryTrack()->GetGlobalTime()); |
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151 | |
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152 | } |
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